c46fa8acdc
over the wire (to help the case when applications break with cifs mandatory lock behavior. Add part one of mount option for requesting case insensitive path name matching. Signed-off-by: Steve French (sfrench@us.ibm.com)
929 lines
28 KiB
C
929 lines
28 KiB
C
/*
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* fs/cifs/readdir.c
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*
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* Directory search handling
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*
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* Copyright (C) International Business Machines Corp., 2004, 2005
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/smp_lock.h>
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsproto.h"
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#include "cifs_unicode.h"
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#include "cifs_debug.h"
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#include "cifs_fs_sb.h"
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#include "cifsfs.h"
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/* BB fixme - add debug wrappers around this function to disable it fixme BB */
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/* static void dump_cifs_file_struct(struct file *file, char *label)
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{
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struct cifsFileInfo * cf;
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if(file) {
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cf = file->private_data;
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if(cf == NULL) {
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cFYI(1,("empty cifs private file data"));
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return;
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}
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if(cf->invalidHandle) {
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cFYI(1,("invalid handle"));
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}
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if(cf->srch_inf.endOfSearch) {
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cFYI(1,("end of search"));
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}
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if(cf->srch_inf.emptyDir) {
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cFYI(1,("empty dir"));
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}
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}
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} */
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/* Returns one if new inode created (which therefore needs to be hashed) */
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/* Might check in the future if inode number changed so we can rehash inode */
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static int construct_dentry(struct qstr *qstring, struct file *file,
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struct inode **ptmp_inode, struct dentry **pnew_dentry)
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{
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struct dentry *tmp_dentry;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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int rc = 0;
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cFYI(1, ("For %s", qstring->name));
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cifs_sb = CIFS_SB(file->f_dentry->d_sb);
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pTcon = cifs_sb->tcon;
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qstring->hash = full_name_hash(qstring->name, qstring->len);
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tmp_dentry = d_lookup(file->f_dentry, qstring);
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if (tmp_dentry) {
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cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode));
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*ptmp_inode = tmp_dentry->d_inode;
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/* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
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if(*ptmp_inode == NULL) {
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*ptmp_inode = new_inode(file->f_dentry->d_sb);
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if(*ptmp_inode == NULL)
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return rc;
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rc = 1;
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d_instantiate(tmp_dentry, *ptmp_inode);
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}
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} else {
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tmp_dentry = d_alloc(file->f_dentry, qstring);
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if(tmp_dentry == NULL) {
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cERROR(1,("Failed allocating dentry"));
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*ptmp_inode = NULL;
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return rc;
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}
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*ptmp_inode = new_inode(file->f_dentry->d_sb);
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tmp_dentry->d_op = &cifs_dentry_ops;
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if(*ptmp_inode == NULL)
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return rc;
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rc = 1;
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d_instantiate(tmp_dentry, *ptmp_inode);
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d_rehash(tmp_dentry);
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}
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tmp_dentry->d_time = jiffies;
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*pnew_dentry = tmp_dentry;
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return rc;
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}
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static void fill_in_inode(struct inode *tmp_inode,
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FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode)
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{
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loff_t local_size;
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struct timespec local_mtime;
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struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
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struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
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__u32 attr = le32_to_cpu(pfindData->ExtFileAttributes);
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__u64 allocation_size = le64_to_cpu(pfindData->AllocationSize);
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__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
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cifsInfo->cifsAttrs = attr;
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cifsInfo->time = jiffies;
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/* save mtime and size */
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local_mtime = tmp_inode->i_mtime;
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local_size = tmp_inode->i_size;
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/* Linux can not store file creation time unfortunately so ignore it */
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tmp_inode->i_atime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
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tmp_inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
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tmp_inode->i_ctime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
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/* treat dos attribute of read-only as read-only mode bit e.g. 555? */
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/* 2767 perms - indicate mandatory locking */
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/* BB fill in uid and gid here? with help from winbind?
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or retrieve from NTFS stream extended attribute */
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if (atomic_read(&cifsInfo->inUse) == 0) {
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tmp_inode->i_uid = cifs_sb->mnt_uid;
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tmp_inode->i_gid = cifs_sb->mnt_gid;
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/* set default mode. will override for dirs below */
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tmp_inode->i_mode = cifs_sb->mnt_file_mode;
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}
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if (attr & ATTR_DIRECTORY) {
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*pobject_type = DT_DIR;
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/* override default perms since we do not lock dirs */
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if(atomic_read(&cifsInfo->inUse) == 0) {
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tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
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}
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tmp_inode->i_mode |= S_IFDIR;
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} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
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(attr & ATTR_SYSTEM) && (end_of_file == 0)) {
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*pobject_type = DT_FIFO;
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tmp_inode->i_mode |= S_IFIFO;
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/* BB Finish for SFU style symlinks and devies */
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/* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
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(attr & ATTR_SYSTEM) && ) { */
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/* we no longer mark these because we could not follow them */
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/* } else if (attr & ATTR_REPARSE) {
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*pobject_type = DT_LNK;
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tmp_inode->i_mode |= S_IFLNK; */
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} else {
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*pobject_type = DT_REG;
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tmp_inode->i_mode |= S_IFREG;
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if (attr & ATTR_READONLY)
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tmp_inode->i_mode &= ~(S_IWUGO);
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} /* could add code here - to validate if device or weird share type? */
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/* can not fill in nlink here as in qpathinfo version and Unx search */
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if (atomic_read(&cifsInfo->inUse) == 0) {
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atomic_set(&cifsInfo->inUse, 1);
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}
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if (is_size_safe_to_change(cifsInfo)) {
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/* can not safely change the file size here if the
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client is writing to it due to potential races */
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i_size_write(tmp_inode, end_of_file);
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/* 512 bytes (2**9) is the fake blocksize that must be used */
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/* for this calculation, even though the reported blocksize is larger */
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tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
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}
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if (allocation_size < end_of_file)
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cFYI(1, ("May be sparse file, allocation less than file size"));
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cFYI(1,
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("File Size %ld and blocks %ld and blocksize %ld",
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(unsigned long)tmp_inode->i_size, tmp_inode->i_blocks,
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tmp_inode->i_blksize));
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if (S_ISREG(tmp_inode->i_mode)) {
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cFYI(1, ("File inode"));
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tmp_inode->i_op = &cifs_file_inode_ops;
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if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
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tmp_inode->i_fop = &cifs_file_direct_ops;
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else
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tmp_inode->i_fop = &cifs_file_ops;
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if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
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tmp_inode->i_fop->lock = NULL;
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tmp_inode->i_data.a_ops = &cifs_addr_ops;
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if(isNewInode)
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return; /* No sense invalidating pages for new inode
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since have not started caching readahead file
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data yet */
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if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
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(local_size == tmp_inode->i_size)) {
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cFYI(1, ("inode exists but unchanged"));
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} else {
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/* file may have changed on server */
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cFYI(1, ("invalidate inode, readdir detected change"));
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invalidate_remote_inode(tmp_inode);
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}
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} else if (S_ISDIR(tmp_inode->i_mode)) {
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cFYI(1, ("Directory inode"));
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tmp_inode->i_op = &cifs_dir_inode_ops;
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tmp_inode->i_fop = &cifs_dir_ops;
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} else if (S_ISLNK(tmp_inode->i_mode)) {
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cFYI(1, ("Symbolic Link inode"));
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tmp_inode->i_op = &cifs_symlink_inode_ops;
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} else {
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cFYI(1, ("Init special inode"));
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init_special_inode(tmp_inode, tmp_inode->i_mode,
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tmp_inode->i_rdev);
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}
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}
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static void unix_fill_in_inode(struct inode *tmp_inode,
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FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
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{
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loff_t local_size;
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struct timespec local_mtime;
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struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
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struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
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__u32 type = le32_to_cpu(pfindData->Type);
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__u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
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__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
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cifsInfo->time = jiffies;
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atomic_inc(&cifsInfo->inUse);
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/* save mtime and size */
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local_mtime = tmp_inode->i_mtime;
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local_size = tmp_inode->i_size;
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tmp_inode->i_atime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
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tmp_inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
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tmp_inode->i_ctime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
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tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
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if (type == UNIX_FILE) {
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*pobject_type = DT_REG;
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tmp_inode->i_mode |= S_IFREG;
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} else if (type == UNIX_SYMLINK) {
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*pobject_type = DT_LNK;
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tmp_inode->i_mode |= S_IFLNK;
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} else if (type == UNIX_DIR) {
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*pobject_type = DT_DIR;
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tmp_inode->i_mode |= S_IFDIR;
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} else if (type == UNIX_CHARDEV) {
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*pobject_type = DT_CHR;
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tmp_inode->i_mode |= S_IFCHR;
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tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
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le64_to_cpu(pfindData->DevMinor) & MINORMASK);
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} else if (type == UNIX_BLOCKDEV) {
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*pobject_type = DT_BLK;
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tmp_inode->i_mode |= S_IFBLK;
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tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
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le64_to_cpu(pfindData->DevMinor) & MINORMASK);
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} else if (type == UNIX_FIFO) {
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*pobject_type = DT_FIFO;
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tmp_inode->i_mode |= S_IFIFO;
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} else if (type == UNIX_SOCKET) {
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*pobject_type = DT_SOCK;
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tmp_inode->i_mode |= S_IFSOCK;
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}
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tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
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tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
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tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
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if (is_size_safe_to_change(cifsInfo)) {
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/* can not safely change the file size here if the
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client is writing to it due to potential races */
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i_size_write(tmp_inode,end_of_file);
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/* 512 bytes (2**9) is the fake blocksize that must be used */
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/* for this calculation, not the real blocksize */
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tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
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}
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if (S_ISREG(tmp_inode->i_mode)) {
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cFYI(1, ("File inode"));
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tmp_inode->i_op = &cifs_file_inode_ops;
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if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
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tmp_inode->i_fop = &cifs_file_direct_ops;
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else
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tmp_inode->i_fop = &cifs_file_ops;
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if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
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tmp_inode->i_fop->lock = NULL;
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tmp_inode->i_data.a_ops = &cifs_addr_ops;
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if(isNewInode)
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return; /* No sense invalidating pages for new inode since we
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have not started caching readahead file data yet */
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if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
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(local_size == tmp_inode->i_size)) {
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cFYI(1, ("inode exists but unchanged"));
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} else {
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/* file may have changed on server */
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cFYI(1, ("invalidate inode, readdir detected change"));
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invalidate_remote_inode(tmp_inode);
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}
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} else if (S_ISDIR(tmp_inode->i_mode)) {
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cFYI(1, ("Directory inode"));
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tmp_inode->i_op = &cifs_dir_inode_ops;
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tmp_inode->i_fop = &cifs_dir_ops;
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} else if (S_ISLNK(tmp_inode->i_mode)) {
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cFYI(1, ("Symbolic Link inode"));
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tmp_inode->i_op = &cifs_symlink_inode_ops;
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/* tmp_inode->i_fop = *//* do not need to set to anything */
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} else {
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cFYI(1, ("Special inode"));
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init_special_inode(tmp_inode, tmp_inode->i_mode,
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tmp_inode->i_rdev);
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}
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}
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static int initiate_cifs_search(const int xid, struct file *file)
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{
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int rc = 0;
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char * full_path;
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struct cifsFileInfo * cifsFile;
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struct cifs_sb_info *cifs_sb;
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struct cifsTconInfo *pTcon;
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if(file->private_data == NULL) {
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file->private_data =
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kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
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}
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|
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if(file->private_data == NULL) {
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return -ENOMEM;
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} else {
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memset(file->private_data,0,sizeof(struct cifsFileInfo));
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}
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cifsFile = file->private_data;
|
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cifsFile->invalidHandle = TRUE;
|
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cifsFile->srch_inf.endOfSearch = FALSE;
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|
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if(file->f_dentry == NULL)
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return -ENOENT;
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|
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cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
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if(cifs_sb == NULL)
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return -EINVAL;
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pTcon = cifs_sb->tcon;
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if(pTcon == NULL)
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return -EINVAL;
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down(&file->f_dentry->d_sb->s_vfs_rename_sem);
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full_path = build_path_from_dentry(file->f_dentry, cifs_sb);
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up(&file->f_dentry->d_sb->s_vfs_rename_sem);
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|
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if(full_path == NULL) {
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return -ENOMEM;
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}
|
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|
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cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
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|
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ffirst_retry:
|
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/* test for Unix extensions */
|
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if (pTcon->ses->capabilities & CAP_UNIX) {
|
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cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
|
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} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
|
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cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
|
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} else /* not srvinos - BB fixme add check for backlevel? */ {
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cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
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}
|
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|
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rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
|
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&cifsFile->netfid, &cifsFile->srch_inf,
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cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
|
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if(rc == 0)
|
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cifsFile->invalidHandle = FALSE;
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|
if((rc == -EOPNOTSUPP) &&
|
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(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
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cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
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goto ffirst_retry;
|
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}
|
|
kfree(full_path);
|
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return rc;
|
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}
|
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|
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/* return length of unicode string in bytes */
|
|
static int cifs_unicode_bytelen(char *str)
|
|
{
|
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int len;
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__le16 * ustr = (__le16 *)str;
|
|
|
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for(len=0;len <= PATH_MAX;len++) {
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if(ustr[len] == 0)
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return len << 1;
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}
|
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cFYI(1,("Unicode string longer than PATH_MAX found"));
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|
return len << 1;
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|
}
|
|
|
|
static char *nxt_dir_entry(char *old_entry, char *end_of_smb)
|
|
{
|
|
char * new_entry;
|
|
FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
|
|
|
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new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
|
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cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
|
|
/* validate that new_entry is not past end of SMB */
|
|
if(new_entry >= end_of_smb) {
|
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cERROR(1,
|
|
("search entry %p began after end of SMB %p old entry %p",
|
|
new_entry, end_of_smb, old_entry));
|
|
return NULL;
|
|
} else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) {
|
|
cERROR(1,("search entry %p extends after end of SMB %p",
|
|
new_entry, end_of_smb));
|
|
return NULL;
|
|
} else
|
|
return new_entry;
|
|
|
|
}
|
|
|
|
#define UNICODE_DOT cpu_to_le16(0x2e)
|
|
|
|
/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
|
|
static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
|
|
{
|
|
int rc = 0;
|
|
char * filename = NULL;
|
|
int len = 0;
|
|
|
|
if(cfile->srch_inf.info_level == 0x202) {
|
|
FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
if(cfile->srch_inf.unicode) {
|
|
len = cifs_unicode_bytelen(filename);
|
|
} else {
|
|
/* BB should we make this strnlen of PATH_MAX? */
|
|
len = strnlen(filename, 5);
|
|
}
|
|
} else if(cfile->srch_inf.info_level == 0x101) {
|
|
FILE_DIRECTORY_INFO * pFindData =
|
|
(FILE_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else if(cfile->srch_inf.info_level == 0x102) {
|
|
FILE_FULL_DIRECTORY_INFO * pFindData =
|
|
(FILE_FULL_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else if(cfile->srch_inf.info_level == 0x105) {
|
|
SEARCH_ID_FULL_DIR_INFO * pFindData =
|
|
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else if(cfile->srch_inf.info_level == 0x104) {
|
|
FILE_BOTH_DIRECTORY_INFO * pFindData =
|
|
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else {
|
|
cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
|
|
}
|
|
|
|
if(filename) {
|
|
if(cfile->srch_inf.unicode) {
|
|
__le16 *ufilename = (__le16 *)filename;
|
|
if(len == 2) {
|
|
/* check for . */
|
|
if(ufilename[0] == UNICODE_DOT)
|
|
rc = 1;
|
|
} else if(len == 4) {
|
|
/* check for .. */
|
|
if((ufilename[0] == UNICODE_DOT)
|
|
&&(ufilename[1] == UNICODE_DOT))
|
|
rc = 2;
|
|
}
|
|
} else /* ASCII */ {
|
|
if(len == 1) {
|
|
if(filename[0] == '.')
|
|
rc = 1;
|
|
} else if(len == 2) {
|
|
if((filename[0] == '.') && (filename[1] == '.'))
|
|
rc = 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* find the corresponding entry in the search */
|
|
/* Note that the SMB server returns search entries for . and .. which
|
|
complicates logic here if we choose to parse for them and we do not
|
|
assume that they are located in the findfirst return buffer.*/
|
|
/* We start counting in the buffer with entry 2 and increment for every
|
|
entry (do not increment for . or .. entry) */
|
|
static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
|
|
struct file *file, char **ppCurrentEntry, int *num_to_ret)
|
|
{
|
|
int rc = 0;
|
|
int pos_in_buf = 0;
|
|
loff_t first_entry_in_buffer;
|
|
loff_t index_to_find = file->f_pos;
|
|
struct cifsFileInfo * cifsFile = file->private_data;
|
|
/* check if index in the buffer */
|
|
|
|
if((cifsFile == NULL) || (ppCurrentEntry == NULL) || (num_to_ret == NULL))
|
|
return -ENOENT;
|
|
|
|
*ppCurrentEntry = NULL;
|
|
first_entry_in_buffer =
|
|
cifsFile->srch_inf.index_of_last_entry -
|
|
cifsFile->srch_inf.entries_in_buffer;
|
|
/* dump_cifs_file_struct(file, "In fce ");*/
|
|
if(index_to_find < first_entry_in_buffer) {
|
|
/* close and restart search */
|
|
cFYI(1,("search backing up - close and restart search"));
|
|
cifsFile->invalidHandle = TRUE;
|
|
CIFSFindClose(xid, pTcon, cifsFile->netfid);
|
|
kfree(cifsFile->search_resume_name);
|
|
cifsFile->search_resume_name = NULL;
|
|
if(cifsFile->srch_inf.ntwrk_buf_start) {
|
|
cFYI(1,("freeing SMB ff cache buf on search rewind"));
|
|
cifs_buf_release(cifsFile->srch_inf.ntwrk_buf_start);
|
|
}
|
|
rc = initiate_cifs_search(xid,file);
|
|
if(rc) {
|
|
cFYI(1,("error %d reinitiating a search on rewind",rc));
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
|
|
(rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
|
|
cFYI(1,("calling findnext2"));
|
|
rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
|
|
&cifsFile->srch_inf);
|
|
if(rc)
|
|
return -ENOENT;
|
|
}
|
|
if(index_to_find < cifsFile->srch_inf.index_of_last_entry) {
|
|
/* we found the buffer that contains the entry */
|
|
/* scan and find it */
|
|
int i;
|
|
char * current_entry;
|
|
char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
|
|
smbCalcSize((struct smb_hdr *)
|
|
cifsFile->srch_inf.ntwrk_buf_start);
|
|
first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
|
|
- cifsFile->srch_inf.entries_in_buffer;
|
|
pos_in_buf = index_to_find - first_entry_in_buffer;
|
|
cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
|
|
current_entry = cifsFile->srch_inf.srch_entries_start;
|
|
for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
|
|
/* go entry by entry figuring out which is first */
|
|
/* if( . or ..)
|
|
skip */
|
|
rc = cifs_entry_is_dot(current_entry,cifsFile);
|
|
if(rc == 1) /* is . or .. so skip */ {
|
|
cFYI(1,("Entry is .")); /* BB removeme BB */
|
|
/* continue; */
|
|
} else if (rc == 2 ) {
|
|
cFYI(1,("Entry is ..")); /* BB removeme BB */
|
|
/* continue; */
|
|
}
|
|
current_entry = nxt_dir_entry(current_entry,end_of_smb);
|
|
}
|
|
if((current_entry == NULL) && (i < pos_in_buf)) {
|
|
/* BB fixme - check if we should flag this error */
|
|
cERROR(1,("reached end of buf searching for pos in buf"
|
|
" %d index to find %lld rc %d",
|
|
pos_in_buf,index_to_find,rc));
|
|
}
|
|
rc = 0;
|
|
*ppCurrentEntry = current_entry;
|
|
} else {
|
|
cFYI(1,("index not in buffer - could not findnext into it"));
|
|
return 0;
|
|
}
|
|
|
|
if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
|
|
cFYI(1,("can not return entries when pos_in_buf beyond last entry"));
|
|
*num_to_ret = 0;
|
|
} else
|
|
*num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* inode num, inode type and filename returned */
|
|
static int cifs_get_name_from_search_buf(struct qstr *pqst,
|
|
char *current_entry, __u16 level, unsigned int unicode,
|
|
struct cifs_sb_info * cifs_sb, ino_t *pinum)
|
|
{
|
|
int rc = 0;
|
|
unsigned int len = 0;
|
|
char * filename;
|
|
struct nls_table * nlt = cifs_sb->local_nls;
|
|
|
|
*pinum = 0;
|
|
|
|
if(level == SMB_FIND_FILE_UNIX) {
|
|
FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
|
|
|
|
filename = &pFindData->FileName[0];
|
|
if(unicode) {
|
|
len = cifs_unicode_bytelen(filename);
|
|
} else {
|
|
/* BB should we make this strnlen of PATH_MAX? */
|
|
len = strnlen(filename, PATH_MAX);
|
|
}
|
|
|
|
/* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
|
|
*pinum = pFindData->UniqueId;
|
|
} else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
|
|
FILE_DIRECTORY_INFO * pFindData =
|
|
(FILE_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
|
|
FILE_FULL_DIRECTORY_INFO * pFindData =
|
|
(FILE_FULL_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
|
|
SEARCH_ID_FULL_DIR_INFO * pFindData =
|
|
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
*pinum = pFindData->UniqueId;
|
|
} else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
|
|
FILE_BOTH_DIRECTORY_INFO * pFindData =
|
|
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
} else {
|
|
cFYI(1,("Unknown findfirst level %d",level));
|
|
return -EINVAL;
|
|
}
|
|
if(unicode) {
|
|
/* BB fixme - test with long names */
|
|
/* Note converted filename can be longer than in unicode */
|
|
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
|
|
pqst->len = cifs_convertUCSpath((char *)pqst->name,
|
|
(__le16 *)filename, len/2, nlt);
|
|
else
|
|
pqst->len = cifs_strfromUCS_le((char *)pqst->name,
|
|
(wchar_t *)filename,len/2,nlt);
|
|
} else {
|
|
pqst->name = filename;
|
|
pqst->len = len;
|
|
}
|
|
pqst->hash = full_name_hash(pqst->name,pqst->len);
|
|
/* cFYI(1,("filldir on %s",pqst->name)); */
|
|
return rc;
|
|
}
|
|
|
|
static int cifs_filldir(char *pfindEntry, struct file *file,
|
|
filldir_t filldir, void *direntry, char *scratch_buf)
|
|
{
|
|
int rc = 0;
|
|
struct qstr qstring;
|
|
struct cifsFileInfo * pCifsF;
|
|
unsigned obj_type;
|
|
ino_t inum;
|
|
struct cifs_sb_info * cifs_sb;
|
|
struct inode *tmp_inode;
|
|
struct dentry *tmp_dentry;
|
|
|
|
/* get filename and len into qstring */
|
|
/* get dentry */
|
|
/* decide whether to create and populate ionde */
|
|
if((direntry == NULL) || (file == NULL))
|
|
return -EINVAL;
|
|
|
|
pCifsF = file->private_data;
|
|
|
|
if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
|
|
return -ENOENT;
|
|
|
|
if(file->f_dentry == NULL)
|
|
return -ENOENT;
|
|
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
|
|
qstring.name = scratch_buf;
|
|
rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
|
|
pCifsF->srch_inf.info_level,
|
|
pCifsF->srch_inf.unicode,cifs_sb,
|
|
&inum /* returned */);
|
|
|
|
if(rc)
|
|
return rc;
|
|
|
|
rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry);
|
|
if((tmp_inode == NULL) || (tmp_dentry == NULL))
|
|
return -ENOMEM;
|
|
|
|
if(rc) {
|
|
/* inode created, we need to hash it with right inode number */
|
|
if(inum != 0) {
|
|
/* BB fixme - hash the 2 32 quantities bits together if necessary BB */
|
|
tmp_inode->i_ino = inum;
|
|
}
|
|
insert_inode_hash(tmp_inode);
|
|
}
|
|
|
|
/* we pass in rc below, indicating whether it is a new inode,
|
|
so we can figure out whether to invalidate the inode cached
|
|
data if the file has changed */
|
|
if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
|
|
unix_fill_in_inode(tmp_inode,
|
|
(FILE_UNIX_INFO *)pfindEntry,&obj_type, rc);
|
|
} else {
|
|
fill_in_inode(tmp_inode,
|
|
(FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc);
|
|
}
|
|
|
|
rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
|
|
tmp_inode->i_ino,obj_type);
|
|
if(rc) {
|
|
cFYI(1,("filldir rc = %d",rc));
|
|
}
|
|
|
|
dput(tmp_dentry);
|
|
return rc;
|
|
}
|
|
|
|
static int cifs_save_resume_key(const char *current_entry,
|
|
struct cifsFileInfo *cifsFile)
|
|
{
|
|
int rc = 0;
|
|
unsigned int len = 0;
|
|
__u16 level;
|
|
char * filename;
|
|
|
|
if((cifsFile == NULL) || (current_entry == NULL))
|
|
return -EINVAL;
|
|
|
|
level = cifsFile->srch_inf.info_level;
|
|
|
|
if(level == SMB_FIND_FILE_UNIX) {
|
|
FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
|
|
|
|
filename = &pFindData->FileName[0];
|
|
if(cifsFile->srch_inf.unicode) {
|
|
len = cifs_unicode_bytelen(filename);
|
|
} else {
|
|
/* BB should we make this strnlen of PATH_MAX? */
|
|
len = strnlen(filename, PATH_MAX);
|
|
}
|
|
cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
|
|
} else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
|
|
FILE_DIRECTORY_INFO * pFindData =
|
|
(FILE_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
|
} else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
|
|
FILE_FULL_DIRECTORY_INFO * pFindData =
|
|
(FILE_FULL_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
|
} else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
|
|
SEARCH_ID_FULL_DIR_INFO * pFindData =
|
|
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
|
} else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
|
|
FILE_BOTH_DIRECTORY_INFO * pFindData =
|
|
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
|
|
filename = &pFindData->FileName[0];
|
|
len = le32_to_cpu(pFindData->FileNameLength);
|
|
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
|
} else {
|
|
cFYI(1,("Unknown findfirst level %d",level));
|
|
return -EINVAL;
|
|
}
|
|
cifsFile->srch_inf.resume_name_len = len;
|
|
cifsFile->srch_inf.presume_name = filename;
|
|
return rc;
|
|
}
|
|
|
|
int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
|
|
{
|
|
int rc = 0;
|
|
int xid,i;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct cifsFileInfo *cifsFile = NULL;
|
|
char * current_entry;
|
|
int num_to_fill = 0;
|
|
char * tmp_buf = NULL;
|
|
char * end_of_smb;
|
|
|
|
xid = GetXid();
|
|
|
|
if(file->f_dentry == NULL) {
|
|
FreeXid(xid);
|
|
return -EIO;
|
|
}
|
|
|
|
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
|
|
pTcon = cifs_sb->tcon;
|
|
if(pTcon == NULL)
|
|
return -EINVAL;
|
|
|
|
|
|
switch ((int) file->f_pos) {
|
|
case 0:
|
|
/*if (filldir(direntry, ".", 1, file->f_pos,
|
|
file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
|
|
cERROR(1, ("Filldir for current dir failed "));
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
file->f_pos++; */
|
|
case 1:
|
|
/* if (filldir(direntry, "..", 2, file->f_pos,
|
|
file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
|
|
cERROR(1, ("Filldir for parent dir failed "));
|
|
rc = -ENOMEM;
|
|
break;
|
|
}
|
|
file->f_pos++; */
|
|
case 2:
|
|
/* 1) If search is active,
|
|
is in current search buffer?
|
|
if it before then restart search
|
|
if after then keep searching till find it */
|
|
|
|
if(file->private_data == NULL) {
|
|
rc = initiate_cifs_search(xid,file);
|
|
cFYI(1,("initiate cifs search rc %d",rc));
|
|
if(rc) {
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
}
|
|
default:
|
|
if(file->private_data == NULL) {
|
|
rc = -EINVAL;
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|
|
cifsFile = file->private_data;
|
|
if (cifsFile->srch_inf.endOfSearch) {
|
|
if(cifsFile->srch_inf.emptyDir) {
|
|
cFYI(1, ("End of search, empty dir"));
|
|
rc = 0;
|
|
break;
|
|
}
|
|
} /* else {
|
|
cifsFile->invalidHandle = TRUE;
|
|
CIFSFindClose(xid, pTcon, cifsFile->netfid);
|
|
}
|
|
kfree(cifsFile->search_resume_name);
|
|
cifsFile->search_resume_name = NULL; */
|
|
|
|
/* BB account for . and .. in f_pos as special case */
|
|
|
|
rc = find_cifs_entry(xid,pTcon, file,
|
|
¤t_entry,&num_to_fill);
|
|
if(rc) {
|
|
cFYI(1,("fce error %d",rc));
|
|
goto rddir2_exit;
|
|
} else if (current_entry != NULL) {
|
|
cFYI(1,("entry %lld found",file->f_pos));
|
|
} else {
|
|
cFYI(1,("could not find entry"));
|
|
goto rddir2_exit;
|
|
}
|
|
cFYI(1,("loop through %d times filling dir for net buf %p",
|
|
num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
|
|
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
|
|
smbCalcSize((struct smb_hdr *)
|
|
cifsFile->srch_inf.ntwrk_buf_start);
|
|
/* To be safe - for UCS to UTF-8 with strings loaded
|
|
with the rare long characters alloc more to account for
|
|
such multibyte target UTF-8 characters. cifs_unicode.c,
|
|
which actually does the conversion, has the same limit */
|
|
tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
|
|
for(i=0;(i<num_to_fill) && (rc == 0);i++) {
|
|
if(current_entry == NULL) {
|
|
/* evaluate whether this case is an error */
|
|
cERROR(1,("past end of SMB num to fill %d i %d",
|
|
num_to_fill, i));
|
|
break;
|
|
}
|
|
|
|
rc = cifs_filldir(current_entry, file,
|
|
filldir, direntry,tmp_buf);
|
|
file->f_pos++;
|
|
if(file->f_pos == cifsFile->srch_inf.index_of_last_entry) {
|
|
cFYI(1,("last entry in buf at pos %lld %s",
|
|
file->f_pos,tmp_buf)); /* BB removeme BB */
|
|
cifs_save_resume_key(current_entry,cifsFile);
|
|
break;
|
|
} else
|
|
current_entry = nxt_dir_entry(current_entry,
|
|
end_of_smb);
|
|
}
|
|
kfree(tmp_buf);
|
|
break;
|
|
} /* end switch */
|
|
|
|
rddir2_exit:
|
|
FreeXid(xid);
|
|
return rc;
|
|
}
|